<?php

namespace Framework;

use App\Controllers\ErrorController;
use Framework\Middleware\Authorise;

class Router
{
    protected $routers = [];

    /**
     * 注册一条路由规则
     * 
     * @param string $method
     * @param string $url
     * @param string $action
     * @param array $middleware
     * @return void
     */

    private function registerRoute($method, $uri, $action,$middleware=[])
    {

        list($controller, $controllerMethod) = explode('@', $action);
        // inspectAndDie($controllerMethod);
        $this->routers[] = [
            'method' => $method,
            'uri' => $uri,
            'controller' => $controller,
            'controllerMethod' => $controllerMethod,
            'middleware'=>$middleware
        ];
    }

    /*     添加一个路由 GET
    @param string $uri
    @param string $controller
    @param array $middleware
    @return void */

    public function addGet($uri, $controller,$middleware=[])
    {
        $this->registerRoute('GET', $uri, $controller,$middleware);
    }

    /*     添加一个路由 POST
    @param string $uri
    @param string $controller
    @param array $middleware
    @return void */

    public function addPost($uri, $controller,$middleware=[])
    {
        $this->registerRoute('POST', $uri, $controller,$middleware);
    }

    /*     添加一个路由 DELETE
    @param string $uri
    @param string $controller
    @param array $middleware
    @return void */
    public function addDelete($uri, $controller,$middleware=[])
    {
        $this->registerRoute('DELETE', $uri, $controller,$middleware);
    }

    /*     添加一个路由 PUT
    @param string $uri
    @param string $controller
    @param array $middleware
    @return void */
    public function addPut($uri, $controller,$middleware=[])
    {
        $this->registerRoute('PUT', $uri, $controller,$middleware);
    }


    // 新增error方法
    public function error($httpCode = 404)
    {
        http_response_code($httpCode);
        loadView("error/{$httpCode}");
        exit;
    }



    public function route($uri)
    {
        $requestMethod = $_SERVER['REQUEST_METHOD'];

        //检查 POST 请求中的特殊字段 _method
        if ($requestMethod === 'POST' && isset($_POST['_method'])) {
            //重写请求方法
            $requestMethod = strtoupper($_POST['_method']);
        }

        // 差分目前url
        $uriSegments = explode('/', trim($uri, '/'));

        foreach ($this->routers as $route) {
            //拆分路由URI
            $routeSegments = explode('/', trim($route['uri'], '/'));

            $match = false;

            //检查拆分后的字符串片段数量是否匹配
            if (count($uriSegments) === count($routeSegments) && strtoupper($route['method'] === $requestMethod)) {
                $params  = [];

                $match = true;

                for ($i = 0; $i < count($uriSegments); $i++) {
                    //如果有uri不匹配或者参数不存在
                    if ($routeSegments[$i] !== $uriSegments[$i] && !preg_match('/\{(.+?)\}/', $routeSegments[$i])) {
                        $match = false;
                        break;
                    }

                    // 检查斌且提取数字
                    if (preg_match('/\{(.+?)\}/', $routeSegments[$i], $matches)) {
                        $params[$matches[1]] = $uriSegments[$i];
                    }
                }
            }
            if ($match) {

                foreach($route['middleware'] as $middleware){
                    (new Authorise())->handle($middleware);
                }

                $controller = 'App\\Controllers\\' . $route['controller'];
                $controllerMethod = $route['controllerMethod'];

                //实例化控制器和调用控制器方法
                $controllerInstance = new $controller();
                $controllerInstance->$controllerMethod($params);
                return;
            }
        }
        ErrorController::notFound();
    }


}